Alert archive / Indiana / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 17, NWS Northern Indiana

February 28, 2017LaPorte County, Saint Joseph County, Indiana

NWS Northern Indiana issued this severe thunderstorm warning at Feb 28, 2017, 9:09 PM CST for LaPorte County, Saint Joseph County, Indiana. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Feb 28, 2017, 9:09 PM CST (03:09 UTC)
Expired: Feb 28, 2017, 9:48 PM CST
In force: 39 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties LaPorte County, IN, Saint Joseph County, IN

The radar

The Northern Indiana radar (KIWX), 77 km from the middle of the area, began a volume at 03:12 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Feb 28, 6:37 PM CST	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 3.2 hours before the alert went out and 243 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 687 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 887 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 395 m²/s²
0-3 km storm-relative helicity: 431 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 6.7

Open this sounding in Storm Lab

The text

As transmitted.

236 
WUUS53 KIWX 010309
SVRIWX
INC091-141-010400-
/O.NEW.KIWX.SV.W.0017.170301T0309Z-170301T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
1009 PM EST TUE FEB 28 2017

The National Weather Service in Northern Indiana  has issued a

* Severe Thunderstorm Warning for...
  Northwestern St. Joseph County in north central Indiana...
  Northern La Porte County in northwestern Indiana...

* Until 1100 PM EST/1000 PM CST/

* At 1008 PM EST/908 PM CST/, a severe thunderstorm was located near
  La Porte, moving east at 60 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  South Bend, La Porte, New Carlisle, Byron, Pinola, Hudson Lake,
  Lydick, Pinhook, Chain-o-lakes, Crumstown and Rolling Prarie.

This includes INTERSTATE 80 IN INDIANA between MILE MARKERs 40 and
54, and between MILE MARKERs 66 and 75.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4176 8643 4176 8628 4163 8625 4152 8687
      4162 8690
TIME...MOT...LOC 0308Z 254DEG 52KT 4158 8680 

HAIL...1.00IN
WIND...60MPH
 
$$

HEIDELBERGER

3 follow-up statements

598 
WWUS53 KIWX 010323
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
1023 PM EST TUE FEB 28 2017

INC091-141-010400-
/O.CON.KIWX.SV.W.0017.000000T0000Z-170301T0400Z/
St. Joseph IN-La Porte IN-
1023 PM EST TUE FEB 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM
EST/1000 PM CST/ FOR NORTHWESTERN ST. JOSEPH AND NORTHEASTERN LA
PORTE COUNTIES...

At 1022 PM EST/922 PM CST/, a severe thunderstorm was located near
New Carlisle, or 10 miles east of La Porte, moving east at 60 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
South Bend, New Carlisle, Byron, Hudson Lake, Lydick, Chain-o-lakes,
Rolling Prarie and Crumstown.

This includes INTERSTATE 80 IN INDIANA between MILE MARKERs 53 and
55, and between MILE MARKERs 66 and 75.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4176 8643 4176 8628 4163 8625 4157 8662
      4169 8667
TIME...MOT...LOC 0322Z 254DEG 52KT 4164 8652 

HAIL...1.00IN
WIND...60MPH
 
$$

HEIDELBERGER

146 
WWUS53 KIWX 010336
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
1036 PM EST TUE FEB 28 2017

INC091-010346-
/O.CAN.KIWX.SV.W.0017.000000T0000Z-170301T0400Z/
La Porte IN-
1036 PM EST TUE FEB 28 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LA PORTE COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A severe thunderstorm watch remains in effect until 400 AM EST for
north central Indiana...and southwestern Michigan.

LAT...LON 4176 8643 4176 8628 4163 8625 4159 8648
      4174 8649
TIME...MOT...LOC 0336Z 254DEG 52KT 4170 8626 

$$

INC141-010400-
/O.CON.KIWX.SV.W.0017.000000T0000Z-170301T0400Z/
St. Joseph IN-
1036 PM EST TUE FEB 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM EST
FOR NORTHWESTERN ST. JOSEPH COUNTY...

At 1036 PM EST, a severe thunderstorm was located over Roseland, or
over South Bend, moving east at 60 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
South Bend, New Carlisle, Lydick, Chain-o-lakes and Crumstown. 

This includes INTERSTATE 80 IN INDIANA between MILE MARKERs 66 and
75.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4176 8643 4176 8628 4163 8625 4159 8648
      4174 8649
TIME...MOT...LOC 0336Z 254DEG 52KT 4170 8626 

HAIL...1.00IN
WIND...60MPH
 
$$

NWS

353 
WWUS53 KIWX 010348
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
1048 PM EST TUE FEB 28 2017

INC141-010357-
/O.CAN.KIWX.SV.W.0017.000000T0000Z-170301T0400Z/
St. Joseph IN-
1048 PM EST TUE FEB 28 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ST. JOSEPH COUNTY
IS CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

A severe thunderstorm watch remains in effect until 400 AM EST for
north central Indiana...and southwestern Michigan.

LAT...LON 4176 8643 4176 8628 4163 8625 4159 8648
      4174 8649
TIME...MOT...LOC 0345Z 254DEG 52KT 4175 8604 

$$

NWS

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Northern Indiana wrote its last area forecast discussion before this severe thunderstorm warning went out at Feb 28, 5:10 PM CST, 3 hours 59 minutes earlier.

Area forecast discussion, Feb 28, 5:10 PM CST, 3 hours 59 minutes before

Area Forecast Discussion
National Weather Service Northern Indiana
610 PM EST Tue Feb 28 2017

.SYNOPSIS...
Issued at 602 PM EST Tue Feb 28 2017

Showers and thunderstorms will develop late this afternoon and
become more numerous tonight. Strong to severe thunderstorms are
likely tonight as a strong cold front approaches. Temperatures
will warm into the lower to middle 60s this evening and then turn
colder Wednesday behind the front with chances for snow showers
lingering into Friday.

&&

.SHORT TERM...(Tonight and Wednesday)
Issued at 252 PM EST Tue Feb 28 2017

Double barrel sfc cyclone through the plains will consolidate invof
of primary sfc reflection deepening currently across central IA.
Strong sw trough in the process of ejecting out of AZ attm with
upper jet streak kicking out into the TX panhandle with standing mtn
wave clouds noted in se AZ. Downstream warm sector deepening rapidly
and no doubt aided by thinning high clouds/strong low level warm
advection back west across MO/wrn IL/se IA. Given upticking theta-e
reservoir here and escalating mass flux on nose of LLJ through I-80
in central IL...expect convection will initiate here twd 21Z and
rapidly track ne...expand east along warm advection wing through
wrn/nrn zones with a risk of large hail.

Primary potential severe event expected to unfold overnight as
potent cyclone shifts ne into wrn lower MI by midnight. Expect
multiple storm clusters will develop within moisture rich and
unstable theta-e ridge across the area. Breath of background
synoptic based flow certainly warrants higher bound severe probs esp
with swd extent with wind damage the greatest threat. However QLCS
tornado processes bear watching particularly south of the US24
corridor either side of midnight as 0-1KM shear goes off chart.
Composite outflow should push much if not all precip out of the area
by daybreak although concede a small risk of shra still possible Wed
am with actual fropa.

&&

.LONG TERM...(Wednesday night through Monday)
Issued at 252 PM EST Tue Feb 28 2017

Attention this period begins with secondary clipper digging through
the srn lakes late Thu. Fairly pronounced low level warm advection
wing ahead of this system suggests sct shsn by aftn through evening
and some minimal snow accums far nw Thu evening.

Otherwise flow aloft flattens quickly through the weekend as temps
snap back to above normal as strong warm advection overspreads the
area beginning Sat. Will keep with prior warmer hedged temps Sat-Mon
as yet another vigorous cyclone develops west through the nrn plains
with rain chcs increasing along swd trailing cold front Mon-Mon
night.

&&

.AVIATION...(For the 00Z TAFS through 00Z Wednesday Evening)
Issued at 602 PM EST Tue Feb 28 2017

Several mid and upper level speed maxima continue to eject along
the base of the trof and along the cold front over il/ia/wi.
Convection will persist in the warm sector ahead of the front
extending from cemtral il into SW Lower MI through 04Z.

Focus then turns to the cold front as the mid level and upper
level trof begin to phase with a well organized squall line to
affect much of the forecast area through 07/09Z. Expect that there
will be LLWS as the front sweeps through.

Widespread IFR and LIFR conditions to prevail through the period.

(For the 18Z TAFS through 18Z Wednesday Afternoon)
Issued at 1229 PM EST Tue Feb 28 2017

Gulf moisture surging nne into the Midwest this aftn was resulting
in lowering ceilings and vsbys in stratus/-dz/-ra/br. IFR
conditions should persist into early this eve before nrn IN gets
more firmly entrenched in the warm sector later this eve when
conditions should improve to vfr. However, a couple rounds of
TSRA also expected this eve and overnight with hail and strong
gusty winds. Ceilings should lower behind the front Wed,
especially at SBN as winds veer to nwly.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...NONE.
MI...NONE.
OH...NONE.
LM...Small Craft Advisory until 5 AM EST Wednesday for LMZ043-046.

&&

SYNOPSIS...Lewis
SHORT TERM...T
LONG TERM...T
AVIATION...Lewis

Visit us at www.weather.gov/iwx

Follow us on Facebook...Twitter...and YouTube at:
www.facebook.com/NWSNorthernIndiana
www.twitter.com/nwsiwx
www.youtube.com/NWSNorthernIndiana

Hazardous weather outlook, Feb 28, 2:44 PM CST, 6 hours 25 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Northern Indiana
344 PM EST Tue Feb 28 2017

INZ004>009-MIZ077>081-OHZ001-002-004-005-015-016-024-025-011000-
St. Joseph IN-Elkhart-Lagrange-Steuben-Noble-De Kalb-Berrien-Cass MI-
St. Joseph MI-Branch-Hillsdale-Williams-Fulton OH-Defiance-Henry-
Paulding-Putnam-Van Wert-Allen OH-
344 PM EST Tue Feb 28 2017

This hazardous weather outlook is for portions of southwest
Michigan...northern Indiana and northwest Ohio.

.DAY ONE...Late this afternoon and Tonight

Thunderstorms will develop late this afternoon and become more
numerous tonight. Some storms may be severe with a threat for large
hail early this evening and damaging winds overnight. Locally heavy
rainfall may lead to minor flooding as well.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed tonight.

&&

Stay tuned to NOAA Weather Radio for further details or updates...or
check our web site at weather.gov/iwx

INZ003-012>018-020-022>027-032>034-011000-
La Porte-Starke-Pulaski-Marshall-Fulton IN-Kosciusko-Whitley-
Allen IN-White-Cass IN-Miami-Wabash-Huntington-Wells-Adams-Grant-
Blackford-Jay-
344 PM EST Tue Feb 28 2017 /244 PM CST Tue Feb 28 2017/

This hazardous weather outlook is for portions of northern Indiana.

.DAY ONE...This afternoon and Tonight

Thunderstorms will develop late this afternoon and become more
numerous tonight. Some storms will be severe with a threat for large
hail early this evening and damaging winds overnight, especially
along and south of Route 30. Locally heavy rainfall may lead to
minor flooding as well.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will be needed tonight.

&&

Stay tuned to NOAA Weather Radio for further details or updates...or
check our web site at weather.gov/iwx

LMZ043-046-011000-
New Buffalo MI to St Joseph MI-Michigan City IN to New Buffalo MI-
344 PM EST Tue Feb 28 2017

This hazardous weather outlook is for portions of The Nearshore
Waters of Southeastern Lake Michigan.

.DAY ONE...This afternoon and Tonight

Thunderstorms will develop late this afternoon and become more numerous
this evening. Some of the storms this evening may produce storm
force wind gusts and large hail.

Conditions will be hazardous to small craft tonight.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Conditions hazardous to small craft are expected Wednesday into
Thursday.

&&

Stay tuned to NOAA Weather Radio for further details or updates...or
check our web site at weather.gov/iwx

In the hours before

Local storm report, Feb 28, 7:53 PM CST, 1 hour 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
853 PM EST TUE FEB 28 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0814 PM     MARINE TSTM WIND 3 NW MICHIGAN CITY      41.74N 86.91W
02/28/2017  M64 MPH          LMZ046             IN   C-MAN STATION

            MEASURED AT MICHIGAN CITY C-MAN STATION.

&&

NWS NORTHERN INDIANA
IRIS SYSTEM

Local storm report, Feb 28, 8:12 PM CST, 57 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
912 PM EST TUE FEB 28 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0900 PM     TSTM WND DMG     DOWAGIAC                41.98N 86.11W
02/28/2017                   CASS               MI   PUBLIC

            A FEW POWER POLES DOWNED ON M51.

&&

NWS NORTHERN INDIANA
IRIS SYSTEM

Local storm report, Feb 28, 8:33 PM CST, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
933 PM EST TUE FEB 28 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0850 PM     TSTM WND DMG     NILES                   41.83N 86.25W
02/28/2017                   BERRIEN            MI   EMERGENCY MNGR

            MULTIPLE TREES AND POWER LINES DOWNED IN
            AREA. LARGEST WAS 1 FOOT IN DIAMETER.

&&

NWS NORTHERN INDIANA
IRIS SYSTEM

Local storm report, Feb 28, 8:47 PM CST, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
947 PM EST TUE FEB 28 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0947 PM     HAIL             2 E CHAIN-O-LAKES       41.71N 86.34W
02/28/2017  E0.50 INCH       ST. JOSEPH         IN   PUBLIC

            .

&&

NWS NORTHERN INDIANA
IRIS SYSTEM

Local storm report, Feb 28, 8:59 PM CST, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
959 PM EST TUE FEB 28 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0940 PM     HAIL             1 W GRANGER             41.73N 86.16W
02/28/2017  M0.75 INCH       ST. JOSEPH         IN   PUBLIC

            .

&&

NWS NORTHERN INDIANA
IRIS SYSTEM

Local storm report, Feb 28, 9:06 PM CST, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
1006 PM EST TUE FEB 28 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0955 PM     HAIL             1 NNW GULIVOIRE PARK    41.63N 86.25W
02/28/2017  U0.88 INCH       ST. JOSEPH         IN   PUBLIC

            .

&&

NWS NORTHERN INDIANA
IRIS SYSTEM

The office that day

Everything else NWS Northern Indiana issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 28, 6:32 PM CST	Special Marine Warning	IWX		118 min
Feb 28, 7:06 PM CST	Severe Thunderstorm Warning	IWX	LaPorte, Saint Joseph	54 min
Feb 28, 7:20 PM CST	Special Marine Warning	IWX		85 min
Feb 28, 7:52 PM CST	Severe Thunderstorm Warning	IWX	Elkhart, LaPorte, Saint Joseph	53 min
Feb 28, 8:15 PM CST	Severe Thunderstorm Warning	IWX	LaPorte	30 min
Feb 28, 8:36 PM CST	Tornado Warning	IWX	LaPorte, Saint Joseph	39 min
Feb 28, 8:45 PM CST	Severe Thunderstorm Warning	IWX	Elkhart, LaPorte, Saint Joseph	45 min
Feb 28, 9:01 PM CST	Areal Flood Advisory	IWX	Elkhart, LaPorte, Saint Joseph	6 hr
Feb 28, 9:01 PM CST	Tornado Warning	IWX	Elkhart, Saint Joseph	29 min
Feb 28, 9:17 PM CST	Flash Flood Warning	IWX	Elkhart, LaPorte, Saint Joseph	6 hr
Feb 28, 9:27 PM CST	Special Marine Warning	IWX		93 min
Feb 28, 9:29 PM CST	Tornado Warning	IWX	Elkhart, LaGrange	31 min
Feb 28, 9:52 PM CST	Tornado Warning	IWX	LaGrange, Steuben	23 min
Feb 28, 10:12 PM CST	Tornado Warning	IWX	Steuben	31 min
Feb 28, 11:18 PM CST	Special Marine Warning	IWX		87 min
Feb 28, 11:40 PM CST	Severe Thunderstorm Warning	IWX	LaPorte, Saint Joseph	65 min
Feb 28, 11:56 PM CST	Severe Thunderstorm Warning	IWX	Fulton, LaPorte, Marshall, Pulaski, Starke	49 min
Mar 1, 12:01 AM CST	Severe Thunderstorm Warning	IWX	LaPorte, Marshall, Saint Joseph, Starke	44 min
Mar 1, 12:22 AM CST	Severe Thunderstorm Warning	IWX	Pulaski, White	38 min
Mar 1, 12:30 AM CST	Severe Thunderstorm Warning	IWX	Elkhart, Kosciusko, LaGrange, Marshall, Noble, Saint Joseph	45 min
Mar 1, 12:43 AM CST	Severe Thunderstorm Warning	IWX	Fulton, Kosciusko, Marshall, Pulaski, Starke	34 min
Mar 1, 1:06 AM CST	Severe Thunderstorm Warning	IWX	Allen, DeKalb, Kosciusko, LaGrange, Noble, Steuben and 1 more	39 min
Mar 1, 1:24 AM CST	Special Weather Statement	IWX	Huntington, Miami, Wabash	51 min
Mar 1, 1:29 AM CST	Severe Thunderstorm Warning	IWX	Allen, DeKalb, Steuben, Whitley	61 min
Mar 1, 1:31 AM CST	Tornado Warning	IWX	Allen	29 min
Mar 1, 1:59 AM CST	Severe Thunderstorm Warning	IWX	Adams, Allen, Blackford, Grant, Huntington, Jay and 2 more	46 min
Mar 1, 9:54 AM CST	Wind Advisory	IWX	Adams, Allen, Blackford, Cass, DeKalb, Grant and 6 more	11 hr

Nearby

Severe Thunderstorm Warnings in Indiana, 2017 Every severe thunderstorm warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.